音声認識のサンプル

2019/04/07
.NET 4.6.2で動くコンソールアプリ追加。

2016/02/15
とりあえず

入力は既定のデバイスになっているマイクから。

コンソール版のソース

Proguram.cs

using System;
using System.Speech.Recognition;
 
namespace eselipsync
{
    class Program
    {
        static void Main(string[] args)
        {
            audioparse a = null;
 
            if (args.Length == 1)
            {
                a = new audioparse(args[0]);
            }
            else
            {
                a = new audioparse();
            }
 
            try
            {
                a.parse();
                Console.ReadKey();
            }
            catch (Exception e)
            {
                Console.WriteLine("{0},{1}", e.Message, e.StackTrace);
            }
 
            a.close();
 
        }
    }
    class audioparse
    {
        public bool finish { get; private set; }
        public bool sourceSw { get; private set; }
 
        SpeechRecognitionEngine sre;
        string wavpath;
 
        public audioparse(string wav)
        {
            finish = false;
            wavpath = wav;
            sourceSw = true;
        }
        public audioparse()
        {
            finish = false;
            wavpath = "";
            sourceSw = false;
        }
        public void close()
        {
            sre.Dispose();
        }
        public SpeechRecognitionEngine parse()
        {
            sre = new SpeechRecognitionEngine();
 
            sre.LoadGrammar(new DictationGrammar());
 
            sre.SpeechDetected += sre_SpeechDetected;
            sre.SpeechRecognized += sre_SpeechRecognized;
            sre.RecognizeCompleted += sre_RecognizeCompleted;
            sre.AudioStateChanged += sre_AudioStateChanged;
 
            //sre.SpeechHypothesized += sre_SpeechHypothesized;
            //sre.SpeechRecognitionRejected += sre_SpeechRecognitionRejected;
 
            //sre.BabbleTimeout = new TimeSpan(Int32.MaxValue);
            //sre.InitialSilenceTimeout = new TimeSpan(Int32.MaxValue);
            //sre.EndSilenceTimeout = new TimeSpan(0,0,10);
            //sre.EndSilenceTimeoutAmbiguous = new TimeSpan(Int32.MaxValue);
 
            if (sourceSw)
            {
                sre.SetInputToWaveFile(wavpath);
            }
            else
            {
                sre.SetInputToDefaultAudioDevice();
            }
 
            Console.WriteLine("s 認識開始");
 
            sre.RecognizeAsync(RecognizeMode.Multiple);
 
            return sre;
        }
 
        private void sre_AudioStateChanged(object sender, AudioStateChangedEventArgs e)
        {
            Console.WriteLine("d 入力, {0}", sre.AudioState);
        }
 
        void sre_RecognizeCompleted(object sender, RecognizeCompletedEventArgs e)
        {
            finish = true;
            sre.RecognizeAsyncCancel();
            sre.RecognizeAsyncStop();
            Console.WriteLine("r 認識終了");
        }
        void sre_SpeechDetected(object sender, SpeechDetectedEventArgs e)
        {
            Console.WriteLine("d 検出");
        }
        void sre_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            Console.WriteLine("a {0,0:f9}, {1}", e.Result.Confidence, e.Result.Text);
            for(int idx =0; idx<e.Result.Words.Count; idx++)
            {
                Console.WriteLine("p {0:f9}, {1} -> {2} -> {3}", e.Result.Words[idx].Confidence,
                                                                 e.Result.Words[idx].Pronunciation,
                                                                 e.Result.Words[idx].LexicalForm,
                                                                 e.Result.Words[idx].Text);
            }
        }
    }
}